PETRICA ALEXANDRU, BOGDAN GABRIEL CARP DETERMINATION OF CORRELATION BETWEEN COMPOSITION, ROLLING PARAMETERS AND MECHANICAL CHARACTERISTICS OF THE HOT ROLLED STEELS The controlled lamination of thick sheets involves the use of algorithms for choosing the rolling parameters: the initial heating temperature, the lamination scheme (the distribution of the total thickness reduction on each rolling cage, the number of passes through each cage and the distribution of the thickness reduction on each passage, intermediate cooling - cooling time and speed), and the temperature of the product obtained at the end of the rolling. The complexity of the phenomena, which occur during the hot plastic deformation process and which must be sufficiently well mastered in order to obtain reproducibly the technical specifications imposed on the products with different destinations, is the justification for this work. The data provided by Arcelor-Mittal Galati was used to obtain the mathematical model. Equations that correlate the main mechanical characteristics with the chemical composition of the steel and the parameters of the hot rolling pattern used are presented.
Keywords: controlled rolling steels, thick sheets, regression predictive equation, optimization hot rolling